| Index: content/browser/compositor/reflector_impl.cc | 
| diff --git a/content/browser/compositor/reflector_impl.cc b/content/browser/compositor/reflector_impl.cc | 
| index 2ccded325fef3a6e4e8520dc6c918a7c45031a71..f3b93238faf0dd7870d5a703b97ec754824b1ca7 100644 | 
| --- a/content/browser/compositor/reflector_impl.cc | 
| +++ b/content/browser/compositor/reflector_impl.cc | 
| @@ -201,7 +201,7 @@ void ReflectorImpl::AttachToOutputSurfaceOnImplThread( | 
|  | 
| void ReflectorImpl::UpdateTextureSizeOnMainThread(gfx::Size size) { | 
| MainThreadData& main = GetMain(); | 
| -  if (!main.mirroring_layer || !main.mailbox || | 
| +  if (!main.mirroring_layer || !main.mailbox.get() || | 
| main.mailbox->mailbox().IsZero()) | 
| return; | 
| if (main.needs_set_mailbox) { | 
|  |